Context: MC has been isekai'd to another world in unconscious state, where nations are fighting for supremacy. A girl asked him to join her clan after brought him back to her house, but MC declined her proposal because he's not sure that he's ready to kill people (though he said that he understood that's just the rule of nature in his world too - in order to survive basically you have to kick people down).
Then the girl changed her proposal, asked him to become her husband, in exchange she will provide him housing, food, clothes. MC is so baffled by this, and this is his thought.
(my guess but not sure: "How many times have I been taken aback since I woke up? I’d been so shocked that something soulful was about to leak out of my butthole. ???)
Appreciates if anyone can help me understand the author's intention here.
Girl (seems to be the leader of her clan): 「衣食住を満たしてやる。その代わり───」